Bench Testing: Rotor

Ensure rotor bearings rotate smoothly. Using ohmmeter, check continuity between each slip ring and rotor, individually. Check continuity between each slip ring and rotor shaft, individually. See Fig 1. If continuity exists, replace rotor. Check continuity between slip rings. If continuity does not exist, replace rotor.

Fig 1: Identifying Typical Rotor Components

Courtesy of AMERICAN HONDA MOTOR CO., INC.